[v6,09/16] memcg: enable accounting for file lock caches

Commit Message

Vasily Averin July 26, 2021, 7:01 p.m. UTC

User can create file locks for each open file and force kernel
to allocate small but long-living objects per each open file.

It makes sense to account for these objects to limit the host's memory
consumption from inside the memcg-limited container.

Signed-off-by: Vasily Averin <[e-mail]>
---
 fs/locks.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Patch

diff --git a/fs/locks.c b/fs/locks.c
index 74b2a1d..1bc7ede 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -3056,10 +3056,12 @@  static int __init filelock_init(void)
 	int i;
 
 	flctx_cache = kmem_cache_create("file_lock_ctx",
-			sizeof(struct file_lock_context), 0, SLAB_PANIC, NULL);
+			sizeof(struct file_lock_context), 0,
+			SLAB_PANIC | SLAB_ACCOUNT, NULL);
 
 	filelock_cache = kmem_cache_create("file_lock_cache",
-			sizeof(struct file_lock), 0, SLAB_PANIC, NULL);
+			sizeof(struct file_lock), 0,
+			SLAB_PANIC | SLAB_ACCOUNT, NULL);
 
 	for_each_possible_cpu(i) {
 		struct file_lock_list_struct *fll = per_cpu_ptr(&file_lock_list, i);